diff options
Diffstat (limited to 'src/maths/maths.h')
| -rw-r--r-- | src/maths/maths.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/maths/maths.h b/src/maths/maths.h index 41fbdfc..9206c5c 100644 --- a/src/maths/maths.h +++ b/src/maths/maths.h @@ -132,6 +132,24 @@ static inline mat4 mat4_mult(mat4 lhs, mat4 rhs) { return out_matrix; } +#if defined(CEL_REND_BACKEND_VULKAN) +/** @brief Creates a perspective projection matrix compatible with Vulkan */ +static inline mat4 mat4_perspective(f32 fov_radians, f32 aspect_ratio, f32 near_clip, f32 far_clip) { + // near_clip *= -1.0; + // far_clip *= -1.0; + + f32 half_tan_fov = tanf(fov_radians * 0.5f); + mat4 out_matrix = { .data = { 0 } }; + + out_matrix.data[0] = 1.0f / (aspect_ratio * half_tan_fov); + out_matrix.data[5] = -1.0f / half_tan_fov; // Flip Y-axis for Vulkan + out_matrix.data[10] = -((far_clip + near_clip) / (far_clip - near_clip)); + out_matrix.data[11] = -1.0f; + out_matrix.data[14] = -((2.0f * far_clip * near_clip) / (far_clip - near_clip)); + + return out_matrix; +} +#else /** @brief Creates a perspective projection matrix */ static inline mat4 mat4_perspective(f32 fov_radians, f32 aspect_ratio, f32 near_clip, f32 far_clip) { @@ -144,6 +162,7 @@ static inline mat4 mat4_perspective(f32 fov_radians, f32 aspect_ratio, f32 near_ out_matrix.data[14] = -((2.0f * far_clip * near_clip) / (far_clip - near_clip)); return out_matrix; } +#endif /** @brief Creates an orthographic projection matrix */ static inline mat4 mat4_orthographic(f32 left, f32 right, f32 bottom, f32 top, f32 near_clip, |